SLC18B1 Knockout Cell Line (HCT 116)

The choice depends on whether you are studying SLC18B1's role as a putative polyamine vesicular transporter or its emerging functions in lysosomal/endosomal storage. The Knockout line is appropriate for asking whether SLC18B1 is required for the vesicular accumulation of polyamines (spermine, spermidine) — SLC18B1 is the most recently identified SLC18 family member with proposed polyamine transport activity. Overexpression is useful for testing transport activity or for substrate identification. For polyamine biology research, the EDITGENE SLC18B1 Knockout in HCT 116 enables study of vesicular polyamine handling in a cancer context — polyamines are essential for proliferating cells, including colorectal cancer cells. Rescue with wild-type or transport-deficient SLC18B1 is the standard specificity control. SLC18A1 (VMAT1) and SLC18A2 (VMAT2) paralog expression analysis aids interpretation given the family's vesicular transport biology.

Primary applications: • Polyamine uptake assays: ³H-spermine, ³H-spermidine uptake studies to quantify SLC18B1-dependent transport. • Lysosomal/endosomal localization: imaging-based analysis to characterize SLC18B1 compartmental distribution. • Cancer cell polyamine handling: assessment of polyamine pools in proliferating colorectal cancer cells with disrupted SLC18B1. • SLC18 family studies: VMAT1 (SLC18A1) and VMAT2 (SLC18A2) expression analysis for paralog-specific characterization. EDITGENE recommends this model for researchers investigating SLC18 family transporter biology and cellular polyamine homeostasis.

Yes, with attention to vesicular targeting: • Construct design: use a codon-modified SLC18B1 sequence with a small C-terminal tag (FLAG, HA). SLC18B1 has 12 transmembrane domains in the canonical SLC18 architecture. • Vesicular localization validation: confirm intracellular vesicular localization by imaging before functional assays. • Transport-deficient rescue: substrate-binding mutations enable distinguishing predicted polyamine transport from other functions. • Functional readout: rescue should restore phenotypes identified during knockout characterization (polyamine handling, vesicular function). HCT 116 transduces efficiently with lentivirus and supports stable rescue line generation.